The elders enjoy reminiscing about the past with their long-standing friends. As the time goes by, mobility impaired elders lose their inner sustenance owing to reduction in social gatherings. “AR Happy Times in My Life” allows elderly persons with dementia to scan a special bar-coding label to enter the AR community where they can resonate with the old Hong Kong via AR models while undergoing “reminiscence therapy” at home. In addition, photos and stories of the old days will also be collected and put in the AR living room in order to reproduce their social circles and foster interaction and cohesion.